Namatanai District is the southernmost and larger of the two districts of New Ireland Province in Papua New Guinea. The district covers the southern part of the island of New Ireland, as well as the Tabar Group, the Lihir Group, the Tanga Islands and the Feni Islands. It is the 12th most populated District in Papua New Guinea and is recommended to be split into two districts by 2022. Sentral Niu Ailan Rural LLG will become an Electorate of its own.